JPS5919836A - Brake material pressing device of impact abrasion testing machine - Google Patents

Abstract

PURPOSE:To absorb impact force of the axial direction of a brake material and the conection direction of a revolving disk, and to improve maintenance of a testing machine, by providing successively and continuously a brake material pressing shaft, an actuator and a buffer on a moving rack base, also providing the fixing fittings of the brake material pressing shaft so that a brake material is movable in the tangential direction of a disk and providing the buffer on the fixing fittings. CONSTITUTION:A motor 20 is rotated forwards, and a moving rack base 3 is moved to approach a revolving disk A until a brake material 11 comes to a prescribed position. Subsequently, an oil pressure servo-actuator 7 is operated to a lining material B stick- provided on the revolving disk A which is rotated and the brake material 1 is made to press-contact by prescribed pressure and is tested. The lining material B is stick-provided with an error, therefore, repeated large impact force operates in the pressure direction and the tangential direction of the revolving disk A with respect to the brake material 11, but the impact force in the pressure direction is absorbed by a buffer 9, and the impact force in the tangential direction is absorbed by a buffer 15, therefore, the brake material pressing device itself is subjected to no influence.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for pressing brake material against a lining material of a rotating disk when performing an impact wear test on the brake material.

Brake materials require reliability in their quality and performance for safety purposes during use, and it is necessary to perform an impact abrasion test.

However, in conventional brake material wear tests, a disk with a lining material attached smoothly to the outer periphery of the front surface is rotated, and a test piece made of wear-resistant resin cast iron is pressed against the lining material with a predetermined pressing force. It was being done. However, the actual usage conditions are quite harsh, and in reality, the pressure contact surface of the brake material is rarely a smooth surface. In order to investigate the degree of impact wear, it is necessary to adapt the test mode to reality. As a way to quickly respond to the above reality, it may be possible to perform a wear test on the brake material by adding a step to the surface of the lining material, but in this case, the brake force can be adjusted in the axial direction and in the rotational circle. If a conventional testing machine were used as is, there would be a problem in that the supporting parts of the brake material would be damaged because large repeated blows were applied in the tangential direction of the plate.

The present invention has been made in view of the above problems, and includes:
The pressing of the brake material absorbs the impact force acting on the shaft in the axial direction and the tangential direction of the rotating disk, and the purpose of the pressing of the player material of the impact tester is to provide a device that can improve the maintenance of the testing machine. , A movable frame that can move toward and away from the lining material of the rotating disk is attached to the "fixed frame" (2).This movable frame has an appropriate number of shafts for pressing the brake material that can slide freely in parallel, To press the brake material, a slidable actuator that applies a predetermined pressing force to the shaft and a buffer that buffers the impact in the pushing direction during the test are successively installed, and the brake material is pressed at the tip of the shaft. A brake material is mounted on the fixing fittings attached perpendicularly to these so as to be movable in the tangential direction of the disk via a slide bearing and a brake material mounting seat, and a buffer is further provided to buffer shocks in the tangential direction. The present invention is characterized in that a container is disposed on the fixture.

An embodiment of the brake material pressing apparatus of the present invention will be described below with reference to the drawings.

In the drawing, (1) is a device for pressing the brake material in the impact and abrasion tester according to the present invention, and the device (1) is for pressing the brake material based on the impact in the direction and the tangent of the rotating disk. It is constructed to absorb directional shock.

In other words, (2) is a fixed frame, and (3) is a rotating disk (A).
Lining material (E) attached with a step on the front outer circumference of
A movable pedestal is mounted on the fixed pedestal (2) so as to be able to move toward and away from Appropriate number of books (
In this embodiment, the pressing of the brake material (6 pieces) is carried out by a bearing box (6) which is internally equipped with a slide bearing (δ) that holds the page surface in a slidable manner on the shaft (4), and the pressing of the brake material is carried out by the bearing box (6) which is made up of a slide bearing (δ) that holds the page surface in a slidable manner. Hydraulic pressure for pressing the brake material attached to the tip and described later against the lining material (B) ≠ Each column ↓ Holding body (8) that slidably supports the marine pressure servo actuator (7), and the test In order to buffer the repeated shocks that occur when the brake material is pressed, a shock absorber (0), such as an oil buffer, is successively applied to absorb the axial movement of the shaft (4) and the hydraulic servo actuator (7). It is installed. In addition, 0 groaning is when the brake material is pressed on the shaft (
4) and the hydraulic servo actuator (7),
This is a load cell for detecting the pressing force of the brake material against the lining material (B), which will be described later (see FIGS. 2 and 3 (a)).

0υ is the brake material to be subjected to the shock wear test, and the brake material θυ is a fixing metal fitting θ attached at right angles to the tip of the shaft (4) to hold them together.
On the other hand, it is mounted so as to be movable in the tangential direction of the rotating disk (A) via a slide bearing 03) and a brake material mounting seat 03. (B) is an appropriate number (two in this example) attached to the fixing metal fitting 02) to absorb the movement of the brake material (11) in order to buffer the repeated impact generated by VC during the test. It is a buffer such as an oil buffer. (See Figure 3).

The front surface of the fixing metal fitting 02) corresponding to the moving distance of the brake material (+1) is formed into a convex shape (2) to form a guide track (1G), and is fitted into this guide track 06). The right four parts are provided on the back surface of the slide bearing α3) so that the brake material 0υ can smoothly move around the edges (see FIG. 4). Note that αη is a stopper disposed at a predetermined position on the orbit 06).

Also, when replacing the brake material 0υ, move the movable stand (3).
In this embodiment, as a means for moving forward and backward on the fixed frame (2), a screw shaft that is rotatable in the longitudinal direction of the fixed frame (2) (the direction in which the brake material 0υ is pressed) is installed inside the fixed frame (2). (E) is screwed onto the bottom of the movable stand (3), and the screw shaft θ8) is fixed to the bottom of the movable frame (3). j
The forward and backward movements are performed by forward and reverse rotation via tH and coupling QO (see Fig. 2).

In this embodiment, a fixed pedestal (2) and a movable pedestal (3) are fitted in a dovetail groove (see FIG. 1).

To press the brake material according to the present invention configured as described above, when performing a TIGI impact wear test using the apparatus N (1), first, the movable frame (3) is rotated in the opposite direction by rotating the motor () on the rotating disc ( A)] After making a slight separation and recoil movement, place the brake material 00 to be tested on the brake material mounting seat 0.
Thereafter, the motor is rotated in the forward direction to move the movable frame (3) closer to the rotary disk (A) until the brake material 01) is at a predetermined position.

Next, the hydraulic servo actuator (7)
Test by operating the brake material and pressing the brake material 0υ with a predetermined pressing force.

Here, the lining material (B) is pasted with a step), and the brake material 01) is subjected to repeated large impact forces in the pressing direction and the tangential direction of the rotating disc body). However, the shock force in the pressing direction is absorbed by the shock absorber (0), and the shock force in the tangential direction is absorbed by the shock absorber (15) (1). Therefore, the device itself does not receive any impact when the brake material is pressed.

As described above, the present invention includes a slidable actuator that applies a predetermined pressing force to a shaft of a rotating disk on a fixed frame so as to be able to move toward and away from the lining material, and
A shock absorber for damping the impact in the suppressing direction during the test is installed in sequence, and the brake material is attached to the slide bearing and the brake material to the fixing bracket attached to the tip of the shaft at right angles to these. The lining is attached to the rotating disk because it is installed so as to be movable in the tangential direction of the disk via a mounting seat, and furthermore, a shock absorber for buffering the impact in the tangential direction is provided on the fixing metal fitting. Even when a step is created on the material to perform a more realistic test, pressing the brake material has excellent effects such as allowing the impact wear test to be performed without any damage to the equipment due to impact.

Since the shock absorber has a restoring elastic force, it goes without saying that after absorbing the above-mentioned impact, the brake material returns to its original surface and the impact N1 wear test continues.

[Brief explanation of the drawing]

The drawings show one embodiment of the device of the present invention, and FIG. 1 is an explanatory diagram showing the arrangement relationship between the rotating disk and the device of the present invention, and FIG.
The figure is the arrow ■ view in figure 1, Figure 3 (a) is the arrow ■ view in figure 2, the same figure (b) is the left side view of figure (a), and figure 4 is the figure 3 ← ) is a sectional view taken along line N-■. (1) is a device for pressing the brake material, (2) is a fixed frame, (
3) is a movable frame, (4) is a shaft that presses the brake material, (γ)
is the actuator, (9) (+5) is the shock absorber, 0υ is the brake material, o-bar is the fixing bracket, (Ill) is the slide bearing, 04) is the brake material mounting seat, (A) is the rotating disk, (B
) is lining material. Patent applicant: Japanese National Railways Patent applicant: Sumitomo Metal Industries, Ltd.

Claims (1)

[Claims] (1) Testing is carried out by fully rotating a disk having a lining material attached to the outer periphery of the front surface with a step, and pressing the brake material against the lining material f! Iiii! +, 71 wear test: In the brake material pushing device of 1, a movable frame is installed on the fixed frame so that it can move toward and away from the lining material, and on the movable frame, an appropriate number of parallel wires are attached. A slideable brake material pressing shaft is provided, a slidable actuator that applies a predetermined pressing force to the brake material pressing shaft, and a shock absorber that buffers the impact in the pressing direction during the test are successively installed. Further, the brake material pressing member is mounted on a fixing fitting attached at right angles to the tip of the shaft so that the brake material can be moved in the tangential direction of the disc via a slide bearing and a brake material mounting seat,
An apparatus for pressing brake material in an impact wear tester, further comprising a shock absorber for buffering tangential @J impact on the fixing fitting.